Senior Full Stack Engineer (f/m/d)
Kyan Health
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Benefits offered by this job
Job summary
Kyan Health is seeking a Senior Full Stack Engineer in the United States. This role involves working on our cutting-edge AI-augmented mental health platform, focusing on design and implementation of AI-driven features.
You will collaborate closely with our engineering, data, product, and clinical teams to shape the future of our platform. Candidates should have 6+ years of experience, strong autonomy, and deep expertise in LLM applications, React, TypeScript, and Node.js.
This position offers competitive compensation and stock options along with the opportunity for hybrid or remote work.
Qualifications
- 6+ years of senior-level engineering experience with strong autonomy.
- Deep understanding of modern LLM ecosystem.
- Hands-on experience building production AI agents.
Responsibilities
- Design and implement coding agents and multi-step workflows.
- Build and refine retrieval pipelines and hybrid RAG/logic systems.
- Translate product and clinical requirements into AI-powered experiences.
Skills
Tools
Job description
Kyan Health is an AI-powered enterprise solution that connects employee well-being with measurable business impact. Using predictive analytics, Kyan helps companies monitor and reduce risks like absenteeism, turnover, and presenteeism.
We believe in harmonizing work and life, fostering a positive environment that champions performance and personal growth and well-being at the same time. Our culture thrives on innovation, collaboration, and the well-being of every team member.
Building an industry leading solution for mental well-being
300,000+ users across 90+ countries
Partnered with 200+ licensed psychologists and coaches
€15M+ venture capital raised from renowned investors
Awesome benefits, including unlimited access to our Comprehensive Mental Health App
Kyan Health is building the most advanced AI-augmented mental health and wellbeing platform in Europe. Our mission is to bring high-quality, clinically-grounded psychological support to employees and families across multiple countries, languages, and cultural contexts — with AI playing a central role.
We are looking for a Senior Full Stack Engineer with deep AI experience, particularly in:
AI agents & multi-step reasoning systems
LLM application architectures
Tool-calling, retrieval, orchestration, and evaluation
Modern AI toolchains and best practices
You will work closely with engineering, data, product, and clinical teams to build our AI features end-to-end and help shape the future of our platform.
This is a role with massive influence — we’re early enough that your architectural choices, code, and AI expertise will have a lasting impact.
Frontend
TypeScript
React + Next.js
React Native (plus React Native Web)
Component libraries/design system
Node.js (TypeScript)
Event-driven and service-oriented architecture
BigQuery, PostgreSQL, NoSQL stores
Vector databases, retrieval pipelines
Cloud infra (GCP/Azure)
OpenAI API & Assistants
Azure OpenAI (GPT, embeddings, structured outputs)
LangChain, LlamaIndex, OpenAI function calling
Agent frameworks (custom, or e.g. LangGraph-style)
Evaluation suites, guardrails, prompt tooling
Monitoring + model observability
Design and implement coding agents, task-specific AI agents, and multi-step workflows that power user-facing features.
Build and refine retrieval pipelines, embeddings flows, and hybrid RAG/logic systems.
Architect robust prompting, function-calling, and tool orchestration systems.
Own features across Next.js, backend services, and mobile/web.
Translate product and clinical requirements into AI-powered user experiences.
Work with data pipelines, BigQuery, analytics, and experimentation frameworks.
Build and evolve our shared React/React Native component library and design system.
Ensure accessibility, performance, and multi-market language support.
Set coding standards for AI-integrated features.
Mentor others on AI architecture, LLM patterns, evaluation, and failures modes.
Challenge assumptions, propose better approaches, and push for pragmatic, responsible AI usage.
Senior-level engineering experience, ideally 6+ years, with strong autonomy.
Deep understanding of the modern LLM ecosystem: models, embeddings, fine-tuning, structured outputs, evaluation, latency/cost tradeoffs.
Hands-on experience building production AI agents.
Strong React + Next.js + TypeScript experience.
Experience building cloud-hosted applications (Azure, GCP, etc.).
Solid backend experience with Node.js, APIs, data modeling, auth, performance.
Familiarity with BigQuery or similar analytical data warehouses.
Strong product awareness — focus on usability, clarity, and delivering outcomes.
Pragmatic engineering mindset: readable code, clear patterns, low complexity.
Prior work in healthtech, HR tech, or other sensitive domains.
Experience with evaluation frameworks, AI observability, or human-in-the-loop workflows.
Background in mobile development (React Native, native iOS/Android).
Experience with multi-language or multi-market products.
Make an Impact: Your work will directly contribute to improving mental health in workplaces around the world.
Ownership: You’ll have the chance to take ownership of our content production processes.
Innovative Environment: Work in a greenfield space where your ideas aren't just welcome—they're essential.
Collaborative Team: Join a supportive team where collaboration and innovation are at the heart of what we do. We are an easy to work with & low ego team, and want to keep it like that.
Full Access to Our Comprehensive Mental Health App:
Unlimited use of Kyan Health's AI well-being companion "KAI" and guided meditation courses.
Unlimited sessions with licensed psychologists.
Unlimited sessions with ICF-certified coaches.
Competitive compensation, adjusted for experience.
Meaningful stock options in a rapidly growing AI-driven healthtech company.
Work with a mission-driven team and product that genuinely helps people.
Hybrid in Berlin or remote within CET±4.
Autonomy, ownership, and a chance to shape foundational AI systems from the ground up.
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